Hi C47,
I used to fly in NW Germany with a UK military GA club and, to echo sharksucker, the German controllers, at the larger airports and smaller fields (not much experience of the latter though), had a good command of English.
I have, somewhere in my upside down, inside out domicile, a German-English Pictionary, which has several pages of aviation diagrams, airliners, PA28's, Cessnas (inside and out) etc with English and German translations of all the bits and pieces.
PM me your address and I'll get copies off to you.
Mit freundlichen Gruessen,
Tony P